Advertisements
Advertisements
Question
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
Advertisements
Solution
Carbon dioxide and water cannot be obtained back from glucose and oxygen hence it is a chemical change.
APPEARS IN
RELATED QUESTIONS
Changes in which only ______ properties of a substance change are called physical changes.
Melting of solid (wax) is a physical change.
Write short answer.
Give two examples of periodic changes
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Classify the following as a physical or a chemical change.
Boiling of water
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
Give two examples for the following case:
Physical changes which are reversible
Mention a few physical properties of a substance.
